Cylinder-grinding machine.



B. & W. STONE.

CYLINDER GRINDING MACHINE. uruonlox mum :u. 24, mo.

Patented may 30, 1911.

f rave/21 rd.

.2 cmomi; 556.46

B. 8; W. STONE. cYLmmm GRINDING mcmun;

APILI GAI'IOH TILED IA]. 24, 1910. Patented May 30, 1911.

B. 6; W. STONE. CYLIHDEB GRINDING MACHINE. 'urmouloi rmzn u!.24,1m.

993,901 -Pamented May 30, 1911.

4 sums-exam 4 UNITED sTAtrns EDMOND STONE AND WILLIAM STONE, OF CHICAGO, ILLINOIS.

CY LINDER-GRINDING MACHINE.

Specification of Letters Patent.

Patented llIay 30, 1911.

Application filed January 2%, 1910. Serial No. 539,813. 4

To all whom it may concern:

Be it known that we, EDMOND STONE and \YzLLrAw S'roxn, citizens of the United States, residing at Chicago, in the county of Cool: and State of Illinois, have invented certain new and useful Improvements in Cylinder-Grinding lllachincs, of which the following is a specification.

This invention relates to grinding mechanism for grinding and dressing the interior surfa es of hollow cylindrical bodies, such as engine cylinders and the like; and has for its object to provide a means whereby the work may be accomplished with the greatest facility and accuracy.

In this instance, the invention is shown as an attachment for and is used in connection with an ordinary machine shop lathe.

Figure 1 is a plan of a lathe having the attachment mounted thereon. Fig. i is side elevation of the same. Fig. 3 is a longitudinal section of the grinding or boring mechanism. Fig. 4 is a similar view with some parts in a relatively dill'erent position. Fig. 5 is a transverse section on line 5, Fig. 3. Fig. 6 is a transverse. section on line (3, Fig d. Fig. 7 is a transverse section on line 7, Fig. 2. Fig. 8 is a transverse section on line 8, Fig. 2. Fig. :3 is a transverse section on line 9, Fig. 2. Fig. 10 is a transverse section of a cylinder, showing a grinding wheel in its relative working position. Fig. 11 is a side elevation, showing a universal chuck and means employed in clamping a cylinder in position to be operated upon.

A represents the bed of an ordinary lathe, and B the traveling carriage which is operated automatically in the usual manner.

A rotatable sleeve 12 is mounted in a journal or hearing-box 13, as best shown in Figs. 3 and I. This sleeve has a gcar-wheel 14 formcd on one end thereof and is provided with a lhmge 15 on the opposite end, both of which overlap the respective end.- of the journal-box. The sleeve 12 has a taper eccentric horc lll thcretln'ough, as best shown in Figs. 5 and (3. The. rear end of a hollow shaft 17 is eccentric in cross-section and is made tapering to correspond to the taper eccentricity of the inclosing sleeve, and has a close fit therein. (ompaniou tuhular hearing-plugs 18 and l!) are threaded in the ICSPQI'HVG ends of the hollow-shaft 17, as best shown in Fig. 3. A shaft or spindle 20 is inserted through the hollovw shaft and the plugs 18 and 19 which provide la journal-bearing therefor. The ends of shaft 20 project from the ends of the hol low-shaft and has a band-pulley 21 mounted on the rear end thereof. A belt will conmeet this pulley with the driving motive I power. A suitable grinding-wheel 22 is hollow-shaft and its sleeve rotate together, l as a unit at a very low speed, making about ten to fifteen turns per minute. The shaft 20 runs at a very high speed and in the 0pposite direction from that of the hollowshaft.

A lock-nut 23, provided with a number of handles ill for manually manipulating the same, is threaded 0n the rear end of the hollowshaft 17. This nut is provided with a flange 25 recessed in the'gear 14, as best shown in Figs. 3 and 4. A collar 26 bears against the outside of the nut-flange 25 and is secured to the gear 14 by a number of stud-bolts 27. This permits of the locknut turning in place but preventing :1 lateral movement. The functions of this nut is to lock the hollow-shaft and its sleeve impart a slight forward endwisc movement to the hollow-shaft and loosen the same in the sleeve, so that the former may be turned by hand in changing the relative eccencrcasing or diminishing the throw of the grinding-wheel on shaft 20. i

It will be noted that the contacting surfaces of the hollow shaft and its inclosing sleeve taper in opposite directions, and both being eccentric, in cross-section, has the cffcct of impartin r to the front end of shaft 20 and the grin ing wheel mounted thereon, an orbital movement and thereby causing the grinding-wheel to travel in a circular path around ,the interior wall of the cylinder or work, in the operation of grinding and truing the same. The relative conf wheel and engine cylinder being shown in Fig. 10. It will he noted that but :1 art oi the periphery of the grinding-whee is in contact with the work at the same time. The space a between the out of contact surfaces is somewhat exaggerated, but it wil he understood that Winding-wheels of dif. ft-reut diameters wil he used in accordance: with the diameter of die work and confining the orbital movement or throw within practical limits.

mounted on the front end of shaft 20. 'The tightly together for rotation and also to' tricity of the hollow-shaft and sleeve in intact and Working position of the grinding 4 4 inn] t e Litc out-nut 1-; must he tinned in the :1 t t An aperture l 29 opens into the hollow-shaft and stops therein. \Vhen these apertures register in line, as shown in Figs. 3 and 5, a pin 220 may be inserted therein which will lock the 1):!!15

together against turning.

In tllislocked relation of the hollow-shalt. and its sleeve the grinding-shaft 20 is inits normal central per i sition as indicated by the dotted circular l clamping bolts 59 are inserted in providing line 31 in Fig. 10. In this position the grinding-wheelisheld away from contact with the work and which permits of the convenient removal of the same to be replaced by other work. when the grinding wheel a is to he brought into contact with the surfa e of the work the pin is remmed and the hollow-shalt turned to bring the grindingwhecl against the surface of the work, as shown in Fig. 10. It will he understood that in the operation of moving the grinding-wheel away from and toward he work,

ment. When the parts are properly posil tioncd, the lock-nut 23 is turned in the opposite direction and the hollow-shaft drawn back into close engagement. with its sleeve.

[The tl.-ro\v ol' the orhilal movement is intire ositions.

creased or diminished by turning the hollowshat't independently oE its slwve so as to hring the high part 32 of the-cta'cntric rain of the hollow-shaft and the corresponding high part 33 of the sleeve, in dill'ercnl relally this arrangement the grimlingwhccl may he accurately set to tale; anything from a light to a heavy cut as may be required. l'he adjustment is positive and cannot. fail to dress the cylinder to a true circle.

The journal-hex lit provided with companion transverse. plates ill arranged -\ertically andhaving horizontal slot 35 there- .in. The plates iii are secured to standards 36, provided with vertical slots 37, by means of bolts 38 inserted through said slots and permits ol' the journal-boxliving adjusted 5 both laterally and vertically. The standards 36 rise trotn a base 39 which is movahle on the bed of the lathe and is secured in any )osition to which it is moved by a clamping i as shown in Figs. 1, 2 and 8.

ted to the spindle 46 in the usual manner and which in conjunc ion with the train of gearing described, transmits the required motion to gear-wheel ti on sleeve 1'2.

A face-plate 47 is adjustahly secured to the carriage hy companion angle'plates 48,

T hcse angleplates are provided with vertical slots 49 and the integral arms so of the face-plate with horizontal slots 51 through which the f or the required adjustment in setting the faceplate 47 in :u-cordance with the work.

The face-plate t? (Fig. 11) carries a numher of clamping bars 53 adjustably secured thereto by bolts The purpose of these liars is to rigidlv secure the work in place on the face-plate. In this instance the work shown in place, is an engine cylinder 55, the inner ends of the bars overlapping the edge of the cylinder endtlange 56 in locking the cylinder against the face-plate. The cylinder is set in alinement by means of universal chuck :37, the jaws 58 of which are expanded to bear against. the inner circumferential wall of the cylinder. During this operation the chuck is mounted on the end of shaft. 20 from which the grinding-wheel has been temporarily removed. 'hen the cylinder is centered the clamping-bars are tightened and the cylinder firmly locked in place. The chuck is then removed and the grimling-wheel remounted in its working position.

t nder the ordinary arrangement it sometimes takes hours to properly set and center a cylinder to he bored out. By the present; arrangement this operation may he aceonn plishcd in a few minutes. insuring accuracy and saving much valuable time.

In this instance the work is fed to the grinding vheel in the line of its axis. but it is obvious that this operation may be reversed by connecting the carriage B with the base supporting the journal-box 13.

()ne of the important features of this invention. is the orbital movement, and in ractical working it. will he understood that the diameter of the circle described gradually grows less from the grinding-Wheel to the vanishing point at the rear end of the grinding-wheel shaft which occupies practically a fixed center. Thus the movement; must always be positive and the grindingwhcel made to travel in the path of a true circle and doing the work accurately with all mechanical precision.

A reamer or other tool may be used as an auxiliary to the grinding-wheel when necessary, and can be mounted on either the hollow shaft or grinding shaft 20, which will impart the proper feed movement: to such tool.

\Vhat we claim is 1. Tu mechanism of the class described, a.

tevoiuble sleeve having a tapering bore fion with reference to said sleeve, and Ins-ans themtbrough, a hoiiow-shaftinszerteci Hierain and tapered exterim'ly to conform "in said bore and means for imparting an enclwise {movement %u said shaft independent imsn that of said slaeve.

In a machine of tlw class dew. ed, a sleme mtahflAy numljned and having fill eccentric iFJlO flwnafluuu glg :1 b0110 it 10 hsvin 1-2 reinpan! Li mnf imez't 4 sleeve, (2 t-Xiitl'iui sm'iwi'e said 1 i scaring ecmrntria-uiiy .in the opposits direc- I I a X l i associated with said shaft whereby the same may be locked 1n said sleeve t0 rotate therewith, or loosened to ba turned independently thereof.

In testimony whereofwe mfix our signa- L. B. Conn-Ami, J. B. Dmnmsax. 

